"Tea decaffeinated using a natural CO-2 process retains 90% of its cancer-fighting properties."

If caffeine is removed with a compound called ethyl acetate, only about 30% of the tea's healing polyphenols (believed to fight cancer and heart disease) remain. But if caffeine is removed using a more expensive water-and-carbon-dioxide process, about 90% of the polyphenols remain.

Prevention, February 2000